Pneumatic motor.



c. P. BRAND.

PNEUMATIC MOTOR.

APPLICATIQN FILED APR. 13. 1915.

1,223,758., Patented Apr. 24,1917.

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UNTTED ATENT GEORGE 3?. BRAND, OF NEW YORK, N. Y.

PNEUMATIC MOTOR.

Specification of Letters Patent.

Patented Apr. 24, 191'?) Application filed AprillS, 1915. Serial No. 21,167.

useful improvements in pneumatic motors of that general type employed in automatic musical instruments, although, of course, applicable to other uses.

As is well known, difierent people in purchasing mechanical musical instruments desire difierent finishes, for instance one may wish for mahogany, another for walnut and another for oak, and so on. If a manufacturer were required to carry motors of all of the different woods, it would necessitate a large stock. I aim to obviate this so that a manufacturer will be required to carry much less finished stock than he otherwise would as he can carry in stock the motor built up complete without the end supports and connecting finishing plates, the latter of which can be supplied as occasion requires in any kind of wood that the purchaser may desire.

The invention has for a further object to so construct the motor that the parts are easily accessible for repairs, while combining cheapness of construction, attractiveness in appearance and insuring light running.

Another object of the inventionis to so construct the body of the motor as to permit it to contract and expand lengthwise without warping.

Other objects and advantages of the invention will hereinafter appear and the novel features thereof will be particularly pointed out in the appended claims.

. The invention is clearly illustrated in the accompanying drawings, which, with the numerals of reference marked thereon, form a part of this specification, and in which- Figure 1 is a face view of my improved motor with portions broken away and parts in section.

Fig. 2 is a view of a portion of the same, looking at the other side.

Fig. 3 is a vertical section from front to rear with portions shown in elevation.

Fig. 4. is a perspective view of one of the connecting plates removed, looking at the rear thereof.

Like numerals of reference indicate like parts throughout the different v1ews.

in constructing my motor, I take a solid piece of wood 1 with the grain running in the direction of its lesser dimensions, that is from top to bottom of the motor as it stands in operative position. Upon opposite edges thereof I secure a metal strip retained in position by suitable means, as

screws or the like 3, which extend through elongated slots in the metal strips so as to permit of the necessary expansion and contraction of the member 1, but still pre venting warping of the same in the other 1' matics employed, although it is evident that in some instances these face or seat plates may be omitted and the valves hereinafter described mounted to move directly upon the face of the member 1.

From the opposite face of the member 1 there project lugs 6, as many as there are pneumatics and through openings in these lugs extends a rod 7 which serves as a mounting for all of the pneumatics soon to be described.

The member 1 is provided with a tension chamber 8 extending throughout the length thereof, the same being closed at one end, the other end being in communication with a source of tension through the coupling 9, seen in Figs. 1 and 2. From the tension chamber 8 there are openings, ports,

or passages 10, there being as many of these ports as there are pneumatics mounted upon the block or' member 1. Through the member 1 upon each side of the tension chamber 8 is a passage 11, each communicating through a port 12 in the fixed member 13 of a pneumatic, with the interior of such pneumatic. These pneumatics are arranged in pairs, one of each pair being upon either side of the lug 6, hereinbefore described, as seen clearly in Fig. 3, and each pneumatic is mounted for perfect freedom of movement at both ends,

' the only fixed part being the fixed member 13.

Secured to the movable members 1a of each pair of pneumatics is a connecting plate 15, removably held in position by screws or the like 16. These plates are readily applicable at any time, and when a purchaser desires a motor he simply specifies the finish desired and the manufacturer puts thereon a plate 15 of oak, mahogany, walnut, or any other wood desired. Each plate thus serves to connect the two pneumatics of each pair so as to move them in unison. For convenience of application, the plates 15 are provided upon their inner faces with ears or the like 17 provided with holes 18 through which the rod 7 passes.

The valves 19 may be of any well known or approved form of construction guided in this instance by the guide rods 20 working loosely through openings 21 in the guide members secured to the face of the member 1 or to the seat plate 5 when the latter is employed. These valves are provided with the chambers 23, as shown in Fig. 3, through which and the ports 11 and 12 communication is had between the pneumatics and the tension chamber 8, as will be readily under stood upon reference to Fig. 3.

Th structure hereinbefore described is mounted upon and between end supports 2%, as for instance, by the screws or the like passing through the end supports and into the ends of the member 1. The supports 2 1 are provided with attaching means 25 by which the motor may be afiixed in position to its support within the player.

The valves are actuated in any well known way, as by connections 26 with the motor arms 27 pivotally mounted, as at 28, on the brackets or the like 29 secured to the plates 15 which, as heretofore described, are secured to the movable members of the pneumatics. These arms 27 receive the cranks 30 of the crank shaft 81 mounted at its ends in the supports 2 1 and provided with a sprocket wheel 32, whereby motion may be transmitted in the usual way.

The operation is simple and will be readily understood from the foregoing description when taken in connection with the annexed drawing and further detailed description thereof is not deemed necessary.

The member 1 may be of a single piece, or a plurality of pieces united by glue or otherwise, as may be found most expedient.

ltiiodifications in detail may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages.

What is claimed as new is 1. In a pneumatic motor, the combination of a member having a longitudinally disposed tension chamber and transverse ports, valves controlling said chamber and ports, a plurality of pneumatics in pairs, a plate connecting the pneumatics of each pair, said plates having lugs and being removably secured to the pneumatics, and a rod extending longitudinally of said member and supported in lugs thereon and in the lugs of said plates.

2. In a pneumatic motor, the combination of a member having a longitudinally extending tension chamber and transverse ports, valves on said member one for each pair of ports, pneumatics in pairs disposed upon the other side of said member and communicating with said ports, said member having spaced lugs intermediate the pneumatics of each pair, plates removably secured to and connecting the pneumatics of each pair, and said plates provided with lugs disposed upon opposite sides of the lugs of said member, and a longitudinally disposed rod passed through the lugs of thesaid plates and member and constituting a common pivot upon which all of said pneumatics are rockably mounted.

In testimony whereof I a'fix my signature.

GEORGE 1?. BRAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. 0. 

